Chemical Characterisation, Antioxidant and Antibacterial Activities of Pinus pinaster Ait. and Pinus pinea L. Bark Polar Extracts: Prospecting Forestry By-Products as Renewable Sources of Bioactive Compounds

Agroforestry by-products have gained rising attention in recent years as they represent inexpensive and abundant raw materials that are a source of added-value chemicals, e.g., for food pharmaceutical applications, well bioenergy generation. Pinus pinaster Ait. bark extracts consumed worldwide their cardiovascular benefits, whilst the health potential pinea L. has not yet been deeply exploited. Therefore, this study highlights chemical characterisation Portuguese P. polar extracts, via ultra-high performance liquid chromatography-diode array detection-tandem mass spectrometry (UHPLC-DAD-MSn) analysis, antioxidant antibacterial activities. Quinic acid, an A-type procyanidin dimer isomer, protocatechuic quercetin were identified first time components. Moreover, demonstrated higher total content compounds than bark, with quinic acid being most compound identified. Regarding activity, pine exhibited strong reducing power 2,2-diphenyl-1-picrylhydrazyl (DPPH) 2,2-azinobis-(3-ethyl-benzothiazoline-6-sulfonic (ABTS) radical scavenging effects compared to natural antioxidants. bactericidal actions shown against Staphylococcus aureus Escherichia coli at 3.13–25 mg mL−1 range. Globally, these promising insights can boost sustainable exploitation already occurs biomedical fields.